Method of selection and/or handover for multi radio access technologies in 5g cellular network

Abstract

A method of selection and / or handover for multi radio access technologies in a 5G cellular network. The method includes: 1) collecting, by a user terminal, load information of a candidate Access Point (AP) or an Evolved Node (H)eNB via a local entity of Access Network Discovery and Selection Function (L-ANDSF); 2) checking, by the user terminal, a Received Signal Strength (RSS) value of the candidate AP or (H)eNB, a Reference Signal Received Quality (RSRQ) and a Service Sensitivity to Latency; 3) based on the above information, evaluating suitability of an available radio access technology; 4) triggering, by a specific triggering event, a fuzzy logic controller, to select a most appropriate radio access technology for each session; and 5) establishing a new session to perform admission control or handover.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of International Patent Application No. PCT / CN2014 / 086165 with an international filing date of Sep. 9, 2014, designating the United States, now pending, and further claims foreign priority benefits to Chinese Patent Application No. 201410317316.3 filed Jul. 4, 2014. The contents of all of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to:BACKGROUND OF THE INVENTION[0002]Field of the Invention[0003]The present invention relates to selection among multi radio access technologies (RATs) in cellular networks.[0004]Description of the Related Art[0005]When a user equipment (UE) powers up / reenters a cell-coverage area or is about to leave connected state, the existing LTE cellular network will perform cell-selec...

AI Technical Summary

Benefits of technology

The present disclosure proposes a method that separates the control plane and user plane in a wireless network, allowing the user plane to be transferred to smaller cells for faster transmission. This method ensures reliable transmission of control information. It also reduces the number of handovers and increases the overall throughput and latency performance. The method takes into account various access networks and selects the most suitable network for transmission, optimizing network efficiency. This approach simplifies network selection in a complex 5G network and solves the issue of multi-RAT coexistence.

Problems solved by technology

Cell-selection / reselection procedure and cell-handover procedure are respectively shown in FIG. 1 and FIG. 2, which are complex, inefficient and time-consuming.

In the aforementioned cell-selection / reselection and handover procedures, usually a UE performs selection or handover between two types of networks, however, in scenarios with coverage of multi networks, it often results in frequent handover and, in the case of load increase, it also greatly affects average downlink throughput and average latency, and even affects normal communication.

However, to build a 5G network, one of the issues to be considered is how to solve the above shortcomings of the conventional networks in a multi-RAT selection and / or handover.

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